In a reflector antenna[?], the relative reduction in the effective aperture of the antenna caused by the masking effect of other antenna parts, such as a feed horn or a secondary reflector, which parts obstruct the radiation path.
... is land and 0.6 km² (0.2 mi²) of it is water. The total area is 9.61% water.
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As of the census of 2000, there are 1,749 people, 502 households, ...